-16.77% is the change from 644 to 536
Calculation steps:
[( 536 - 644 ) ÷ 644] x 100 = -16.77%
Formula
Percentage change = [(536 - 644) / 644] x 100
Subtract the new number by the original number
536 - 644 = -108
-108 ÷ 644 = -0.16770186335403728
-0.16770186335403728 x 100 = -16.77%